fix: switch from bumpversion to bump-my-version

mentioned in commit b767b8f9

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!198 (merged)

mentioned in merge request to-be-continuous/samples/python-serverless-on-aws!121 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!203 (merged)

mentioned in merge request to-be-continuous/tools/aws-auth-provider!17 (merged)

mentioned in merge request to-be-continuous/samples/python-on-azure!21 (merged)

mentioned in merge request to-be-continuous/samples/python-library!9 (merged)

mentioned in merge request to-be-continuous/samples/python-helmfile-on-kubernetes!52 (merged)

mentioned in merge request to-be-continuous/samples/python-on-kubernetes!43 (merged)

mentioned in merge request to-be-continuous/tools/gcp-auth-provider!57 (merged)

mentioned in merge request to-be-continuous/samples/python-serverless-on-aws!122 (merged)